android - Listview filter the data contained in database very slowly -

i'm working english persian dictionary ... unfortunately, not using lazzy listview sample in project , project had list , filter out 50 thousand words database , slow typing , updating list occured , please me use lazzy listview in project , use optimized filter reduce use of memory , increase speed .... tnx

this classes :

mainactivity

public class mainactivity extends activity {  listview                         list; imageview                        cleartext; edittext                         editsearch; typeface                         edtsearchfont; static string[]                  word; static int[]                     index; static listviewadapter           adapter; static arraylist<listviewstruct> arraystructlist = new arraylist<listviewstruct>(); context                          context;   // oncreate  @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.listview_main);     context = this;      cursor en = g.database.rawquery("select * english", null);     word = new string[en.getcount()];     index = new int[en.getcount()];     int = 0;     listviewstruct wp = null;     if (en.movetofirst())     {                 {             try {                 word[i] = en.getstring(en.getcolumnindex("english_word"));                 index[i] = en.getint(en.getcolumnindex("word_id"));                 wp = new listviewstruct(word[i], index[i]);                 arraystructlist.add(wp);                 i++;              }             catch (exception e) {                  e.printstacktrace();             }         }         while (en.movetonext());     }     en.close();      list = (listview) findviewbyid(r.id.listview);     adapter = new listviewadapter(this, arraystructlist);     list.setadapter(adapter);     editsearch = (edittext) findviewbyid(r.id.search);     edtsearchfont = typeface.createfromasset(context.getassets(), "fonts/listfont.ttf");     editsearch.settypeface(edtsearchfont);     editsearch.addtextchangedlistener(new textwatcher() {          @override         public void aftertextchanged(editable arg0) {             // todo auto-generated method stub          }           @override         public void beforetextchanged(charsequence arg0, int arg1,                                       int arg2, int arg3) {             // todo auto-generated method stub         }           @override         public void ontextchanged(charsequence arg0, int arg1, int arg2, int arg3) {              string text = editsearch.gettext().tostring().tolowercase(locale.getdefault());             adapter.filter(text);         }     });      cleartext = (imageview) findviewbyid(r.id.cleartextimage);      cleartext.setonclicklistener(new onclicklistener() {          @override         public void onclick(view arg0) {              editsearch.settext("");          }     });  }   @override public boolean oncreateoptionsmenu(menu menu) {     //getmenuinflater().inflate(r.menu.activity_main, menu);     menu.add(0, 1, 1, "about");     menu.add(0, 2, 2, "exit");      return true;  }   //@suppresswarnings("deprecation") @override public boolean onoptionsitemselected(menuitem item) {     // todo auto-generated method stub      switch (item.getitemid()) {          case 1: {              alertdialog.builder builder = new alertdialog.builder(mainactivity.this);             builder.settitle("about")                     .setmessage("\n" + "© copyright" + "\n" + "hossein tahmasebi , 2014" + "\n")                     .setcancelable(false)                     .seticon(r.drawable.logo)                     .setnegativebutton("ok", new dialoginterface.onclicklistener() {                          @override                         public void onclick(dialoginterface dialog, int id) {                             dialog.cancel();                         }                     });             alertdialog alert = builder.create();             alert.show();              break;          }         case 2: {              this.finish();          }      }      return super.onoptionsitemselected(item); }; 

}

listviewadapter

public class listviewadapter extends baseadapter {  // declare variables context                           mcontext; layoutinflater                    inflater; private list<listviewstruct>      localwordslist; private arraylist<listviewstruct> arraystructlist; public int                        index; typeface                          listfont;   public listviewadapter(context context, list<listviewstruct> mainwordlist) {     mcontext = context;     this.localwordslist = mainwordlist;     inflater = layoutinflater.from(mcontext);     this.arraystructlist = new arraylist<listviewstruct>();     this.arraystructlist.addall(mainwordlist);  }   public class viewholder {      textview word;  }   @override public int getcount() {     return localwordslist.size(); }   @override public listviewstruct getitem(int position) {     return localwordslist.get(position); }   @override public long getitemid(int position) {     return position; }   @override public view getview(final int position, view view, viewgroup parent) {      final viewholder holder;      listfont = typeface.createfromasset(mcontext.getassets(), "fonts/listfont.ttf");      if (view == null) {         holder = new viewholder();         view = inflater.inflate(r.layout.listview_item, null);         holder.word = (textview) view.findviewbyid(r.id.word);         view.settag(holder);     } else {         holder = (viewholder) view.gettag();     }      holder.word.settext(localwordslist.get(position).getword());     holder.word.settypeface(listfont);      view.setonclicklistener(new onclicklistener() {          @override         public void onclick(view arg0) {             intent intent = new intent(mcontext, entranslatedresultactivity.class);             intent.putextra("index", (localwordslist.get(position).getindex()));             intent.putextra("word", (localwordslist.get(position).getword()));             mcontext.startactivity(intent);         }     });      return view; }   // filter class public void filter(string chartext) {     chartext = chartext.tolowercase(locale.getdefault());     localwordslist.clear();     if (chartext.length() == 0) {         localwordslist.addall(arraystructlist);     }     else     {         (listviewstruct wp: arraystructlist)         {             if (wp.getword().tolowercase(locale.getdefault()).startswith(chartext))             {                 localwordslist.add(wp);             }         }     }     notifydatasetchanged();  } 

}

listviewstruct

public class listviewstruct {     private int    index;     private string word;     private string translatedword;       public listviewstruct(string word, int index) {          this.word = word;         this.index = index;      }       public int getindex() {         return this.index;     }       public string getword() {         return this.word;     }       public string getpopulation() {         return this.translatedword;     } } 

g class , helperio , entranslatedresultactivity show translated result word.....

if these classes required here , tell me put them ,

thank attention.....

this example of cursoradapter(use instead of baseadapter) need pass cursor , don't need put cursor in arraylist in while loop

public class imagecursoradapter extends cursoradapter { public imagecursoradapter(context context, cursor c) {     super(context, c); }  @override public void bindview(view view, context context, cursor cursor) {     textview word = (textview) view.findviewbyid(r.id.word);     word.settext(cursor.getstring(cursor.getcolumnindex("english_word")));     word.settypeface(listfont); view.setonclicklistener(new onclicklistener() {      @override     public void onclick(view arg0) {         intent intent = new intent(context, entranslatedresultactivity.class);         intent.putextra("index", (cursor.getint(cursor.getcolumnindex("word_id")));         intent.putextra("word", (cursor.getcolumnindex("english_word")));         context.startactivity(intent);         }   }); }  @override public view newview(context context, cursor cursor, viewgroup parent) {     layoutinflater infalinflater = (layoutinflater) this._context                 .getsystemservice(context.layout_inflater_service);     view convertview = infalinflater.inflate(r.layout.listview_item, null);     bindview(convertview , context, cursor);     return convertview ; } }   

in newview getview method (without viewholder)
, in bindview need set data view can set edittext , bind adapter set ontextchangelistener edittext have fast search when user typing in edittext.
better way better performance exist share know